Feng shui techniques to optimize plant health will be discussed at 10 a.m. at the Sloat Center at 1580 Lincoln Ave. (near Grand Avenue) in San Rafael. Phone (415) 453-3977. The fee for each class is $5.

ORCHIDS WITH AN ISLAND THEME

Features will include demonstrations, plant raffles and experts to answer questions. Entertainment will be provided from 11 a.m. to 1 p.m. Saturday by the Royal Hawaiian Ukulele Band, with hula dancers.

The show will run from 9 a.m. to 5 p.m. Saturday and 10 a.m. to 5 p.m. Sunday at the Lakeside Garden Center, 666 Bellevue Ave. in Lakeside Park. Admission is free. Phone (510) 482-4161.